Casing and tubing elevator.



VPATENTED JUNE 2, 1903r v 'H. W. BLAISDELL. APPARATUS FOR CLEANING SANDFILTER BEDS.

i APPLIGATION FILED MAY a. moz. No MODEL. e SHEETS-SHEET 2.

WITPIEEEEE:

iinrirsgn rati-3s Patented .Tune 2, 1903.

Fries.

PATENT CAslNe AND TUBING .ELEvAToa SPEGIFICATION forming part `ofLetters Patent No; 729,846, dated June 2, 1903. vApplication filedFebruary 3, 1902. Serial No. 92,379. (No model.)

To @ZZ whom it' may concerne:

Beit known that I, KENTON CH1oKERING,a citizen of the United' States,residing at Oil Oity,in the county of Venango, State of Pennthe sectionsclosed as when in use.

Sylvania, have invented certain new and useful Improvements in OasingandTubing Elevators; and I hereby declare the following-to be a full,clear,V and exact description of fthe same, reference being had to theaccompanying drawings, in whichf Figure 1 is a perspective View of acasing and tubing elevator embodying my invention, Fig. 2 is aperspective View thereof, the'sections open to receive the tubing o1'casing. Fig. 3 is a top plan view of the elevator, the sections closedas in Fig. 1. Fig. 4 is a side elevation of the elevator, the sectionsclosed and the pin-latch shown in dotted lines. is a vertical section onthe line 5 5, Fig. 4, to show Ighe vertical taper of the lockingarms. y

Like symbols refer to like parts wherever they occur.

My invention relates to that class of devices employed for lowering,raising, or drawing well tubing or casing, commonly termed casing ortubing elevators,7 and comprising suitable reins or bail-links,clamp-sections suspended therefrom, and a locking mechanism for theclamp-sections, and has for its objects to so construct and combine theclamp and lock mechanism as to insure the proper closing of theclamp-sections and support the same against forces which tendto strainthe pivot and separate the clamp-sec tions laterally at their lower endsor at points below the bail-links.

To this end my invention, generally stated, embraces the combination, ina casing or tubing elevator and with the pivoted clamp-jaws thereof, ofa yoke or link-latch, which includes the locking-arms above and a secondlock below the bail-link of the elevator,where by the clamp-sections aresupported against forces which tend to separate them and strain thepivot thereof.

There are other minor novel features of construction, as alsocombinations of parts, all as will be hereinafter fully set forth andclaimed.

I will now proceed to describe my inven- Fig; 5

tion more fully, so that others skilled in the art to which itappertains may apply the same.

In the drawings, l and 2 indicate the clamp or jaw sections of theelevator, each provided with a perforated bailear or bail-lug c for thereception of the usual bail-links or reins A A. The clamp orjaw sectionsl and 2 have l the usual concave or semicircular tube-seats 3 3, arepivotally connected on'one side, as

at 4L, and opposite thereto are provided with the lugs or locking-arms 55a or equivalent projections for the reception of a yoke or linklatch G,which serves to lock the clamp-sections toge'therabove or atthetop. Thelugs or locking-arms 5 5 are of the same General form in so far as bothare recessed at their junction with the body of the clamp, as at 1a 2a,to form a yoke or latch seat and receive the upper end of the yoke orlink-latch 6, which link-latch lies flush with and completes the uppersurface of the clamp, and also in so far as both lugs or locking-arms 55 taper slightly from within outward (see Fig. 3) and from below upward,(see Fig. 5,) so that the 4yoke or link-latch as it is moved intoposition to close the clamp-jaws forces said lugs orlocking-arms 5 5into apposition from withoutinward and from above downward and insuresan effective support of the jaws or sections at the bottom of the clamp,where most required to relieve the pivot from undue strain and preventthe separation of the clamp-jaws.

The yoke or link-latch 6 is pivotally secured to the lug or locking-arm1 by means of a bolt Ga, (either with or without a sleeve 6",) whichpasses through an elongated slot 5, so as to permit sufficientforwardlplay of the yoke or link-latch 6 to insure its proper seatingwhen the jaw-sections l and 2 are to be locked by i the yoke orlink-latch, and the slot or the interior walls of the link-latchconverge to cor- -respond with the vertical taper of the 1ocking-arms 55, (see Figs. 2 and 3,) which arms or lugs the link-latch incloseswhen-the clampjaws are locked together. i

The lug or locking-arme is cut back or notched in, as at 5c, toaccommodate the bolt 6a or pivot of the latch G and permit the linklatch6 to be swung outward and free from arm 5*L when the jaw-sections 1 and2 are to be opened, and said arm 5 is provided with a IOO . substituted,it' desired.

The inner faces of the lugs or locking-arms 5 5a may be slightlyhollowed out or recessed, as at 5, if desired, to facilitate theseparation of the jaws l and 2 when releasing th tube or casing,r fromthe elevator.

The construction of the elevator being substantially such ashereinbefore pointed out, it will be applied to the tube or casing;f tobe raised or lowered as follows: The link-latch 6 being,Y thrown overand down to release the lufY or locking-arm 5 and the locking-armsseparated, (see Fig. 2,) the tubing or casing;r is introduced betweenthe jaws or sections 1 and 2, the locking-arms 5 5 brought together,after which the yoke or link-latch 6 is turned up and inward over thelocking-arms and its upper end is forced down into the latch-seats 1 2a.In instances where the tubing or casing has a flange-thimble orcoupling-sleeve the same may rest on the upper edge or rim of thejaw-sections 1 and 2 and on the yoke or link-latch, and the weightof thetubing will assist in holding: the yoke or link-latch firmly on itsseat. The link-latch 6 as it is forced y forward and inward acts on thevertical and horizontal inclines or tapering parts of the looking-arms,(see Figs. 3 and 5,) so as to force the arms into contact, especially atthe bottom of the jaws, and this also causes the locking-pin 7 to passthrough the hole 8 in locking-arm 5, and at the same time, if thepinlatch is a'fIiXed to the link-latch 6, the movement of the latchcauses the pin-latch 9 to engage the outer end of the locking-pin 7, andthus lock up and support the lower portion of thevclamp-jaws and pivotagainst lateral and torsional strains.

While the pin-latch is not necessarily affixed to the link-latch or yoke6, it is preferably joined thereto, as it simplifies the construction,facilitates the locking and unlocking of the elevator-jaws, insuresagainst accidental displacement of the pin-lock, and enables thepin-lock toalso assist in drawing Y together and supporting,` thelocking-arms of the elevator-sections.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In a casing or tubing elevator having bail links, the combinationwith pivoted clamp-jaws having lockingarms or lugs, of a yoke orlink-latch which incloses the lockingarms above the hail-links, andapin-lock and latch therefor,which confine the locking-arms below thebail-links, substantially as and for the purposes specified.

2. In a casing or tubing elevator, the combination with pivoted clamp-jaws having locking-arms one of which is provided with a pin andtheother with a pin-hole, of a yoke or link-latch provided with an arm orpin-lock which engages the pin and forms a lock therewith, substantiallyas and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses,this' lst day of February, 1902.

KENTON CHICKERING.

